/ Dictionary / Index S Sioux State: Meaning and Definition of Find definitions for: Sioux' State' Pronunciation: [key] a nickname of the state of North Dakota. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Sioux Falls Sioux War Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language